Machine for forcing fittings into the ends of wooden bars



Oct. 28, 1941. 2,260,389

MACHINE FOR FORCING FITTINGS INTO THE ENDS 0F WOODEN BAR-S.

H. K. LORENTZEN Filed April 22, 1939 4 Sheets-Sheet 1 INV ENT OR.

Aw wm 1M ATTORNEY? BY [ma/filmmaker;

Oct. 28, 1941. Q H. K. LORENTZEN 2,260,389

MACHINE FOR FORCING FITTINGS INTO THE ENDS OF WOODEN BARS Filed April 22, 1939 4 Sheets-Sheet 2 INVENTOR. BY fiaizffffiwzwzza/z Q K141 W ig- ATTORNEYS Oct. 28, 1941- H. K. LORENTZEN MACHINE FOR FORCING FITTINGS INTO THE ENDS OF WOODEN BARS Filed April 22, 1939 4 Sheets-Sheet 3 INVENTOR. fimufiifiaramzwz MA A 4 1 TTORNEYS Oct. 28, 1941. H. K. LORENTZEN 2,260,389

' MACHINE FOR FORCING FITTINGS INTO THE ENDS 0F WOODEN BARS Filed April 22, 1959 4 Sheets-Sheet 4 ATTORNEYS Patented Oct. 28, 1941 MACHINE FOR FORCING FITTINGS INTO THE ENDS F WOODEN BARS Hans K. Lorentzen, Montclair, N. 1., assignor to, l Lorentzen Hardware MfgrCorp New York, N. Y., a corporation of New York' Application April 22, 1939, Serial No. 269,405

13 Claims.

This invention relates to improvements in machines for forcing fittings into the ends of wooden members, and more particularly to machines for forcing fittings into the ends of wooden Venetian blind bars.

In the manufacture of Venetian blinds, it. is desirable to insert fittings of various characters into the ends of certain of the bars used in the blind and heretofore such insertion has been accomplished with considerable difficulty. This is particularly true in the case of wood which splits readily, such as yellow pine, for the reason that the insertion of fittings into the ends of bars made of this wood has been accomplished only by first drilling or otherwise removing some of the material of the bar prior to the insertion of the fitting. If efforts are made to force a fitting into the bar without such prior removal of some of the material thereof, this operation has resulted almost uniformly in splitting the bar.

An object of the present invention is to provide a machine which can be utilized for forcing fittings into the ends of wooden bars without causing or permitting splitting of the bar.

Another object of the invention is to provide a machine of such character that a bar is held against movement and also against splitting in the usual direction during the forcing of a fitting into the end thereof.

Another object of the invention is to provide a machine of the foregoing character in which the forcing element is interchangeable to accommodate fittings of various characters.

Another object of the invention is to provide a machine of the foregoing character in which provision is made for accommodating bars of the various widths customarily used in Venetian blinds.

Another object of the invention is the provision in the machine of means for accommodating therein bars of various thickness such as are customarily used in Venetian blind structures. A further object of the invention is to provide clamping means for holding a bar, which clamping means is manually operated with the operating member or mechanism being adjustable to fit the individual operator.

A further object of the invention is to provide, in conjunction with forcing members for fittings, guide means and fitting retention means for keeping a fitting in alignment during the initial stages of the forcing operation.

In carrying out the foregoing and other objects of the invention, a machine embodying the features of this invention is made upof a base to which is secured a bar clamping device. The device in brief comprises a verticallymovable plate which can be moved into bar; clamping position by means of a rotatable cam acting on the top of the plate. In conjunction with the clamping means, use is made of bar aligning mechanism comprising a stop for one end of the bar and slideable guide members for aligning the edges of the bar with the stop. Associated with the stop is a guideway both for fittings and forforcing members, which latter members are slideable in the guideway and which are adapted toforce a fitting into the end of a wooden-bar held by the clamping mechanism; Since fittings of vari ous characters are ordinarily forced-into a bar A as occasion may demand the present invention provides an arrangement wherein various forcing members canbeinterchanged to make pos- 'sible the adaptation of the machine to the particular fittings. operated in any suitable fashion such as by a footjtreadle or any other desired mechanism.

Since Venetian blinds are made up in various sizes itfollows that bars of different thicknesses and'pf different widths must of necessity be processed by this machine. Accordingly, provision is made in the clamping mechanism for clamping bars of different thicknesses therein in proper alignment with the fitting'guide so that a fitting can be forced into the bar midway between the upper and lower "edges thereof. Provision is also made for aligning bars of different widths with the clamping mechanism and with the fitting guideway, such means comprising in a part a supportfor the opposite .end of the bar with adjustable side aligning members.

' 'Other features, objects and advantages of the invention will become apparent by reference to the following. detailed description of the accompanying drawings wherein Fig. 1 is aplan view of a machine embodying the invention;

Fig. 2 is a section taken substantially on the line-22 of Fig. 1;

Fig. 3 is a section taken sub stantially on the line 3-3 of Fig. 1; Fig. i is an enlarged vertical section showing a part of theforcing; member actuating mechanism;

Fig. 5 is an enlarged section taken substantiallyon the line '5'5 of Fig. 1;

, Fig. is an enlarged fragmentary plan view ofa part of the mechanism shown in Fig. 1;

The forcing member may betype and in the 111mm position of'ths p v f31showingthe Fig. '7 isa perspective View of the cam utilized in the clamping-mechanism; g

Figs. 8, 9 and 10 are perspective views of various types of fittings;

Fig. 11 is a plan view of the fitting of Fig. 9 with the end of its associated forcing member;

Fig. 12 is a section taken substantially on the line l2l2-ofFig. f11;

Fig. 13 is an enlargedTragn-ientary plan view of a part of the mechanism shown in Fig. 1 with the proper forcing member associated with ual fitting of the type shown in-Fig. 10..in.posit ion.

in the guideway along Witlfafffitt Fig. 14 is a view similar toFigt V fitting guide and retaining devices=inproper sition; i

Fig. 15 is a section taken substantially or- 1 .;the

line 15-15 of Fig. 14; V

Fig. 16 is a section taken line lfi lfi-ofEi 15;; a l i a tnes -1 1. 1 s m parts in no her P; 91 .h f m the wev f forcing th fit in ata W n bar?! at the completion ief;

M ,l J s- 1 Fig. 19 is a perspectiveyiewof anend'Tof a wooden a iha eatifiam med.

ime ii itejdu ii e 20 is a similarview of a bar having the F r9fi i f ce h it fl i 1 Fig. 21 a similar. view 'of tribal? having the Fig. fittingforcied thereinto. v Referringnow to thefdra 'iIig and, partrcug larlyto Figs. 1 and ZQIO-fiiidicatesfthe metallic base of the machine upon jwhichthe 'operati'r'ig elements are. mounted. "These elements comprise clamping mechanism indicatedj generally at i l" and fitting forcing mechanism indicated general y 1 .v I

The clamping mechanism is made, upof two angle members 14 having upstandingplatdike partslS. These upstanding parts l'5' 'are spaced apart'a Suitable distance, thefmen ibe'r's' lfl' be ilig secured to'the base" H3 in anysmtamejmanfier:

disposed ears I] 'fextending '1. through j suitable openin s in u i 'h S1151. open n s I extend upwardly an 311110 Stifficillt' t6 4 the plate 16 t0 "I045 Taisd. "116 the fd'siled upper limits. Coiled springs"l9', a1f p051 oned between the under surfacesfof the ears I "I and'fthe top surface of the angle membersWA; elevate th efp lal'leHi. v i I In order that theclampingipl e 6 ma e forced downwardly againsti th' resistance" for springs '19, useis made ,of aicam zflsecuredion a shaft 2| which is rotatably'mounteddn'bearing openings forr'nedin the. uprigh't's-I SII'TH rights .l5 have enlargements or boss v purpose of'provi-ding longer bearing jsurfac substantially on the Fig. f Qof the Y :par-tflof the cam surface.

{the lfrandle is of a' thickness corresponding substantially to the length of the part 25 of the integral extension of the cam and the corrugations 9 are 'of such dimensions and of such number "thatthis' handle-can be adjusted to any desired ,pesition ;relative to the cam by simply moving has a setpin 21 extending therethrough into contact with the shaft 2| to lock the cam to the shaft.

To accomplish rotation of the shaft, a handle I or lever 28 is provided. This handle 28 has one end part thereof formed of an enlargement hollowed out and provided with a plurality of corrugations of' such shape as to closely Icorrespond to the shapeof-a box socket type wrench. The purpose of these corrugations 29 is to permit adj-u'stment of the handle relative to any desired The socket part of the handle until the socket part thereof is out of engagement with the wrench engaging surfaces 2j u turning the handle to the .desired position and thenengagmg the socket portion with the surfaces 25, To prevent the handlefrom-becom ing adventitiously disengaged from thewrench engaging surfaces 25, use is made of a keeper member 39 'inthe nature of a plate pivotedon a shaft 43! extending through the uprights 1 5 and held in pla ce by cotter. pins 32 or by any other suitable arrangement. y The keeper member has a part thereof' cut out-as -indicated at fl},

which cutout part, is dimensioned to-fit snugly partially around the collar.. part v26 of,tl 1e cam=ele{ ment. W hen this keeper is in the vposition slio wr1 in Fig. 2, it serves to-prevent the handle frorn'beeing moved longitudinally. of the cam elementto disengage the handle, from the surfaces 2 5. The

shaft-3lalso serves the purpose of 'a stop forthe handle in. one extreme position thereof} The I I handle 28 as shown inFig. 3, maybe-of any de,-]

sired length, but its effective length maybe creased by telescopically fitting-an, extension member I 35- onto oneendof the handle. J The member I35 as shown can be 0? i ubular form'. Provision is made for fastening the extensi'onlfii to the handle 28 and as shown in thedravvirfigs.

this'arrangement comprises a buttonel'ike member I36 seated partially in a. recess 131 in .mem ber 28. In addition to the button I36,..use is madej.of a spring I38 likewise positioned in the same recess. The button has a flange part as shown so' that when the spring and the flange part have been inserted into the recess.- the material of the handle can be spun overthe fiangeto retain itinthe recess. The extension l3.5. has anfaperturel3 9' button I36;

Fastened in the wall, thereof toreceive theouter end;o'f t'he tending longitudinally therefrom is an angle b ar shown in Figs. 1 and 3, the cam Z0' 'is"disposed 35 which hasa cross-bar fastened to the extreme end thereof. The top surface of the bar 36 is substantially in the same'plane'as. the sun;

faceof the base l iifbetween. the'upriglits 15f This barv 36 serves as a support for one e'hdQofa wooden bar 3? whichcan be heldby the clamping mechanism. ,Bar' 37 .is .offthe type commonly V Y used in Venetian blind, constructions-andparti man of a type used as a tilt bar,'for,such stru tures'. Since tilt bars conventionally used int y art may be ofany v one 'of variousw'idths, [provi sionflis made fo-r obtaining prope'rfalignment "of at least three' ,Widths of bars Iinthis clamping mechanism. 5 As shoWrifidFig; '11; the cross-bar 36 "has three openings 38rthj'erein indiagonal' relationacrosgthe bar. Apin 39 has 'a'jport'ion' to one edge of the base it 1 three openings 38 with the major portion 39 extending. upwardly from the bar 36. These openings 38 are so positioned that when the pin 39 is in the proper opening, as indicated by the legendary matter (Fig. 1), a wooden bar 31 of the proper width corresponding to the position of pin 39 will be partially aligned with the clamping mechanism. The number of openings 38 may be increased in accordance with the number of widths of wooden bars to be processed.

In addition to the aligning devices just described, use is made of further aligning mechanism positioned to operate upon the other end of the wooden bar 31. This latter mechanism comprises in part a stop 40 secured to the base l in any suitable manner together with a sliding member 4| which is of generally U-shape. The sliding member 4| is made of fiat metal and is positioned upon the upper surface of the base In. Since this member is as before stated of gen-. eral U-shape, it follows that the stop 46 is positioned between the legs of the member 4|. This member 4| is retained on the base by means of overlying plates 42 resting on spacing members 44 slightly thicker than themember 4|. The plates 42 and the spacers 44 can be secured to the base by screws passing through them into the base or in any other suitable manner. Extending upwardly from the member 4| are a pair of posts 45 and extending upwardly from the opposite plates 42 are posts 46. Springs 41 are secured between posts 45 and 46 as shown in Fig. 1. The ends of the U-shaped member 4| are tapered inwardly and are provided with upstanding flanges 48. I

The member 4| cooperates with the end of the stop member 40 and with the properly located pin 39 to align a bar 31 in the machine. Normally the member 4| is in a position in which the inner ends of the flanges 48 extend beyond the end of the stop member 49 toward the clamping mechanism, which position is due to the action of the springs 41. When it is desired to align a bar 31 in a machine, the end thereof, in which a fitting is to be forced, is inserted under the clamping plate l6 and the bar is moved until the ends thereof engage the surfaces of the flanges 48. The other end of the bar 31 has one side thereof resting against the pin 39 positioned in the proper opening 38 dependent upon the width of the bar 31. This bar 31 can then be moved toward the stop 46 until the end of the bar contacts this stop, during which movement the member 4| is moved against the action of the springs 41. The cooperation of the various parts in this manner assures that the bar 31 will beproperly aligned in the machine so that a fitting can be forced into the end of the bar with the side edges of the fitting symmetrically located relative to the side edges of the wooden bar. When the bar has been so properly positioned, it can be clamped in place by manipulation of the handle 28 in such manner that the cam 20 forces the clamping plate l6 downwardly into contact with the top surface of the bar 31. The desired amount of clamping pressure can be applied through the handle 28 to force the clamping plate I6 into such contact with the wooden bar as to firmly hold it in place and as to effectively resist cross splitting of the bar upon the introduction of a fitting thereinto.

The forcing of a fitting, into the end of the wooden bar is accomplished by the following mechanism. The member 40 previously deone end of the member.

scribed as having one function of serving as a stop for the end of a wooden bar also has other functions such as providing a guideway for a-fitting and also a guideway for a piston member used in forcing the fitting into the wooden bar. For these latter functions, the top surface of the member 40 has an arcute shaped depression 59 midway between the side edges thereof and extending rearwardly a suitable distance from In addition, surfaces 5| are. provided in the top of the member 49 on each side of theldepression 50 and below the top surface of the member 40. These surfaces extend the full length of the member 40. The rear half of the member 46 is of greater height than the front half thereof and a plate 52 is secured across the top of this rear part, thereby providing a channel of substantially rectangular shape in cross-section. The floor of this channel is formed in part by the two surfaces 5|. This channel serves as a guideway for a piston 55 which is of similar shape in cross-section, i. e. substantially rectangular. The piston slides in the guideway so formed and upon the surfaces 5 I. The rear end of the piston 55 fits in a forked end of a sliding member 56, which member passes through bosses 51 extending upwardly from the base ID. The piston 55 has a through opening 58 therein which can be brought into register with aligned openings 59 in the forked front end of the member 56 and a pin 68 can pass through the aligned openings 58 and 59 to secure the piston to the member 56. The rear end of the member 56 is vertically forked as indicated at 63 to receive a rounded end 6| of a bell crank 62. A pin 64 is secured through the forked end of the member 56 to retain the end 6| of the crank in the fork of this member 56. The bell crank 62 is pivotally mountedv between two members 65 depending from the under side of the base In and this base I6 is slotted for the passage of one arm of the bell crank 62. The other end of the bell crank 62 has secured thereto a bar 66 which can be connected to a suitable treadle (not shown) so that pressure applied by an operators foot will serve to rotate the crank about its pivotal point and thereby move the member 56 and associated piston 55 toward the clamping mechanism. A spring 61 can be connected between the bar 66 and a hook 68, secured to the base H], to move the bell crank in the opposite direction and due to the engagement of the head 6| of the crank with the pin 64, such movement of the crank under the impetus of spring 61, moves the member 56 and associated piston 55 away from the clamping mechanism.

The piston shown in Figs. 1 to 6 inclusive is designed for use in forcing a fitting of the Fig. 8 type into one end of a wooden bar. By reference to Fig. 8, it will be seen that this fitting is a substantially fiat member of generally U-shape and having the legs thereof provided with inwardly extending teeth 10. This. fitting.

can be stamped from sheet metal or formed in any other suitable fashion. The width of the fitting is substantially equal to the width of the guideway formed by the surfaces 5| so that this fitting can be positioned on these surfaces in the manner shown clearly in Figs. 1 and 6.

The forward end of the piston 55 has its under surface cut away as at 1| an amount substantially equal to the thickness of the Fig. 8 fitting. Due to this arrangement, it is possible to locate a Fig. 8 fitting in the guideway with the rear end of the fitting lying under the forward'end-of the piston-55. This piston 55 has a suitable amount of pressure through a foot treadle (not shown) or any other suitable manner to rotate the bell crank 62 about its pivot and to force the member 56 and associated piston 55 toward the bar. The application of force in a uniform manner causes the Fig. 8 fittin to be forced into the end of the bar without requiring the removal of any material from the bar to accommodate the fitting. Ordinarily, driving of such a fitting into the end of. a bar would, on account of the thickness of the fitting, almost invariably cause a splittingof the bar. However, since the end of the bar is firmly clamped by the clamping mechanism, it has been found in actual practice that this type of fitting can be forced into a bar without splitting the same due primarilyto the clamping force applied through the cam, which force effectively prevents such splitting during the insertion operation. It has also been found in practice that once the. fitting has been -in troduced in the bar without causing the splitting thereof during the introduction, that the bar, after the clamping pressure has been released, does not split.

The. introduction of a fitting of the Fig. 9 type into the end of a bar requires a piston designed tocooperate with this fitting. As shown in Fig. 9, the fitting80 thereof has twoleg portions provided with inward teeth substantially of the same shape and configuration as the Fig. 8 fitting. This'fitting, however, instead of being completely fiat has the rear part thereof turned upwardly, at a90 angle to the leg portions and this upward extendingpart has a pin 8| staked or otherwise secured thereto. In conjunction with this fitting, use is made of a piston 55A, one end of which has been illustrated in Figs. 11 and 12 wherein this end of the piston has been shown'in conjunction with a Fig. 9 fitting. By' reference to these figures, it will be seen that, the forward end. of the piston 55A has a channel 82 formed in the under surface thereof to'accornmodate the pin 81.

Piston 55A can be connected to member 55 in the same fashion as the piston '55. When it is desired to force a fitting .of the Fig. 9 construction into the. end of a, wooden bar, such fitting is laid on the guideway in the same manner as the Fig. 8 fitting but with the right angular part atthe end thereof extending upwardly. Asthis fitting is properly positioned in the guideway, the pin 81 is received in the channel 82 so that the upper end part of the piston 55A can bear against the turned up part'of the fitting and the edges of the piston 55A can engage the side edge portions of this upturned When .it is desired to introduce a fitting of the out in the bottom of the member 40 and ex-' tending rearwardly from the depression 50 (Fig. 2). The end of piston 55B is bored out as indicated at 95 to receive the head of a gudgeonpin. This bored out part is so located that only a thin wall is present at the bottom of the rib 92. In addition, a part of the end of the piston is rounded out as at 96 to facilitate inserting a gudgeon pin into the bore 95 from the topxof the piston.

Since the gudgeon pin, when assembled in relation to a piston "55B, does not rest on the guideway on which fittings of the other Wpes may rest, a suitable guiding and weight arrangement is provided for insuring that the pin will be forced into a bar in proper alignment with the bore 95. This arrangement is made up of a --cross-bar 91 secured to the top of plate 52 and having upstanding spaced plate-like portions 98.qBetween these plate-like parts 98 is pivotally mounted adog member 99 having a depending right angular extension ltd which has the end part thereof split or forked as at ldl. The space between the forked portions fill is substantially'equal to the diameter of the nail part 95 of a gudgeon pin. A weight block N32 has an opening cut in one edge thereof so that it can fit around the depending part I00 and be pivoted thereto as at Hi4. When a piston of the type shown in 55 or a piston of the 55A types are used, this guiding and weight arrangement can be dispensed with and in "that event the parts are folded to thepo'sitionshown in Figs. 1 and 2. However, when a 553 piston and a gudgeon pin are used cooperatively, useis also made of the guiding and weightarrangemerit. In Fig. 14, these parts are showninplan View wherein the gudgeonpin is in cooperative relation to the piston 55B and the various parts of the weight and guiding mechanism'aremoved 7 into functioning positions. By reference-to-Fig; 15, it will be seen that the forked end of the depending portion I05 straddles the nail part'SU of the gudgeon pin while the weight H32 rests on pressure is applied to force the pin into-the wooden bar, the parts assume the successive positions shown in Figs. 17 and 18. As the-piston moves toward the bar, the forked end part of extension Hi0 maintains its contact with the flange 9! and continues in a straddled position relative to the part 933 of the gudgeon pin. The

' member 99, along with its part I09, are rotated slightly about its pivot and at the same time, the weight 192 slides forwardly along the top of member 40, also rotating slightly about its pivot. Thus, this weight serves to prevent the gudgeon pin from moving upwardly out of horizontal alignment while the forked endof the depending member-serves to-aid' in maintaining this designed alignment. As the piston progresses forwardly, the weight is finally lifted from the member 40 and likewise the forked end of part I 00 rides over the top edge of the piston clearing the same, until the parts assume the Fig. 18 position which represents the completion of a stroke forcing the gudgeon pin into the bar.

In Fig. 19, a fragmentary showing of an end of a wooden bar has been illustrated with a fitting of the type shown in Fig. 8 forced thereinto.-

This result is accomplished by the cooperation of the parts of the machine with a piston of the shape and characteristics described in connection with piston 55. In Fig. 20, a similar showing has been made of a bar having a Fig. 9 fitting introduced thereinto through the cooperation of the machine when equipped with a piston of the type described in connection with piston 55A. In Fig. 21 a similar showing has been made of a bar having a gudgeon pin introduced thereinto by the operation of the machine when equipped witha piston of the type described in connection with the member 553.

From the foregoing, it will be seen that the present invention provides amachine which operates in a novel and efilcient manner to force fittings into the ends of wooden bars in such fashion that the likelihood of splitting the bar has been substantially eliminated. For this purpose, the-clamping mechanism described in this specification serves not only to hold a bar in proper position but also serves to apply such compressiveforce to the bar as to prevent-the bar from splitting crosswise thereof. The clamping mechanism is capable of adjustment to com-.- pensate for .varying thicknesses of bars being operated upon and for this reason, a shim or plate I ID has been shown in Fig. 2 as being positioned on the bed' of the machine underneath the clamping plate [7. This plate or shim II!) has a button Ill extending downwardly from the under surface thereof to engage in an opening H2 in the bed of themachine. It is to be understood, of course, that shims of other thicknesses can be used to correspond to the thickness of the bar being processed so that the effective level of the bed, can be brought to such a height that a fitting will always be forced into the bar midway between the top and bottom surfaces thereof. To this end, itfollows that a'thick l wooden bar canbe proposed without a shim being located on the bed. As the thicknesses of the various bars being processed decreases, shims of increased thicknesses can be interchanged.

The mechanismutilized for forcing a fitting into the bar is simple and efiicient in operation and is adaptable to being used in connection with different types of fittings. To this end as previously described, different types of pistons can be interchanged depending upon the particular type of fitting to be forced into a bar.

It is to be understood that while the device has been shown and illustrated as being particularly useful in a hand and foot operated machine, power operation thereof can be accomplished without departing from the scope and spirit of the invention. Accordingly, any limitations imposed upon the invention are to be only those set forth in the following claims.

What I claim is:

1. A machine of the type described, comprising a support for a wooden bar, a stop adjacent said support, yieldable guide means associated with said stop for aligning bars of different widths relative to said stop, means for clamping one end of a bar substantially immovable relative to said support, and' means, adjacent said clamping means for forcing a fitting into the clamped end of such bar.

2. A machine of the type described, comprising a support for a wooden bar, means for clamping one end of a bar substantially immovable relative to said support, a stop adjacent said support, yieldable guide means associated with said stop for engagement with one end of a bar and adjustable aligning means for engagement with the other end portion of the bar for aligning bars of different widths relative to said support and said stop, and means adjacent said clamping means for forcing a fitting into the clamped end of such bar.

3. A machine of the type described, comprising a support for a flat wooden bar, a fixed stop to be engaged by one end of the ban means for clamping one end of a bar substantially'immovable relative to said support and against said stop, an open top guideway in the top of said stop for fittings, and means slidable on said guideway and engaging a fitting for moving said fitting along said guideway and for forcing it into the clamped end of such bar.

4. A machine of the type described, comprising a support for a wooden bar, means adjacent said support for forcing 'a fitting into the end of a wooden bar, and means for clamping a wooden bar relative to said support, said clamping means comprising a plate normally lying over the end of said bar, rotatable cam means for forcing said plate into clamping relation to said bar, a captive handle adjustably secured to said cam means for manipulating the same and means for locking said handle to said cam means in any adjusted position.

5. A machine of the type described, comprising a support for a wooden bar, means adjacent said support for forcing a fitting into the end of a wooden bar, and means for clamping a wooden bar relative to said support, said clamping means comprising a plate normally lying over the end of said bar, a shaft, said shaft carrying rotatable cam means for forcing said plate into clamping relation to said bar, said cam means having as parts thereof wrench engaging surfaces, and a handle having a wrench part captive on said shaft and selectively engaged with said surfaces to vary the angularity of said handle relative to the cam means, and a pivoted locking plate movable into position against the end of said wrench engaging surfaces to lock'said handle inadjusted position thereon. 6. A machine of the type described, comprismg a support for a flat wooden bar, means for clamping one end of a bar substantially immovable relative to said support, a stop member for said bar adjacent said support, an aligning 'member slidably mounted and having parts on each slde of said stop member, said aligning member having diverging upright fiat surfaces normally extending beyond said stop, said aligning member being yieldable longitudinally relative to said stop member to permit a bar to be moved into contact with said stop, said diverging surfaces aligning a bar relative to said stop by contact between the end edges of the bar and said surfaces.

7. A machine of the type described, comprising a support for a wooden bar, means for clamping one end of a bar substantially immovable relative to said support, a stop member for said bar adjacent said support, an aligning member slidably mounted and having parts on each sideof said stopmember; said aligning member having diverging upright surfaces normally extending beyond said stop said' aligning member beingyieldableto permit-a bar to be moved into contact'with' said stop, said diverging surfaces aligning one: end 'of a bar relative to said stop, and adjustable means for aligning the other end of a barrelative to said stop.

8:: A machine vof the type described, comprising asupport for a. wooden bar, means for clamping; one end of" a bar substantially immovabl relativefto" said: support, a stop member forsaidibar-a'djacent said support, an aligning member slidably mounted and having parts on each side of said stop member, said aligning member having diverging. upright surfaces normally extending beyond said stop, said aligning member being yieldable -to.:permit bars of different widths to. be moved: selectively into contact: with said stop, said' diverging surfaces aligning one end of a. bar relative to said' stop, and-.adgusta'bl means engaging the'other end of albarandt cooperating with said: surfaces to align a' bar.

9. A machine of the typed'escribed, comprising 'a'su-ppo'rt -for'a wooden bar, means for clamping one: end; of a. bar substantially immovable-relative: tosaid support; a I guideway positioried in axial alignment with a bar clamped in said suppiortgfamovable forcing member slid"- ably mounted said gui'deway, said movable member having: the end" thereof recessed to receive'one: end part "of'a gudgeon" pin, andcombin'ed'guiding and weight means adapted to engagetlieother' end' part of a gudigeo'n pin to align-'t'the same; and: prevent upward movement thereof while the pin is being forced toward and into: a. ban: said'combined. means being contacted by said movable member to? progressively move said-combined means away fr'o na 'gudgeon pm asthe-same forced into a woodenbar.

10; :A machine of the type: described, comprising a support. for a wooden bar, means 'for clamping: one end of a bar substantially immovable-r -relative to said support, a guideway positionedi'n axial? alignment with a bar clamp in said support, a movable forcing member slidably mounted in said guideway, said" movable member having the end? thereoffrecessed to receive one-endpart'of a gudg'eon pin having a'fiange intermediate its ends; guiding means straddling the other endpart of a gudgeon' pin to force said flange against the forcing member and to align said pin and a weight member'resting on said other end of the pin to prevent upward movement thereof while the pin is being for'ced toward and into a bar; said guiding. means and weight member-being contacted by said movable member to progressively move the same awayfrom the gudgeon' pin as it is forced" into a wooden'bar. k s

11. A machine of the type described,compris-i ing a support for awooden bar, means adjacent said support for forcing a fitting into the end of a wooden bar, and means for clamping a wooden bar relative to said support, said clamp ing means comprising a plate normally lying:

over the end of said, bar, rotatable cam means,

rotatable about a shaft for forcing said plate and means for locking the handle to the cam 3 in any of the angular positions of the handle.

12. Almachine of the 'type described compris-i ing a support for a flat wooden bar, a fixedstop to be engaged by one end of a ban; means, for, clamping one end of afbar substantiallyirnmovi-j .able relative to said support and against saidj stop, an open topguideway in the top ofsaid stop for fittings and a slidingmernber movable relative to said guideway, .said sliding :member having the bottom of one end thereof out awayf toffit'over and engage a fiat fitting re s't' ig nf; said guideway and meansfor movingis'aid slid f ing member to cause it to force said fitting into;

the clamped endof suchbarL 13. A machine of the type described a ing a support for a flatwooden bar, afixedstopf to be engaged by one end of a bar, meansf'or clamping one endof a bar substantially immovable; relative to'saidsupport andagainst said; stop, an open top guideway'in the top of said stop for fittings, and a sliding member movable relative to said guideway, said sliding fmember having the bottom of one end thereof recessed, to receiVe a trunnion extending .from an angue,

lar part pf a flat fitting resting .onsaid jguidee way, the end of said slidir1 g member engaging said angular part: of the fittingiand means .for, moving said sliding member to cause it to force, said fitting into the clamped end of such bar. f

HANS LoREnTZEn'i v 

